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40128156 = 2233569653
BaseRepresentation
bin1001100100010…
…0111010011100
32210111201111000
42121010322130
540233100111
63552030300
7665040465
oct231047234
983451430
1040128156
1120718972
1211532390
13840cc93
145487d6c
1537c9c56
hex2644e9c

40128156 has 48 divisors (see below), whose sum is σ = 104378400. Its totient is φ = 13332096.

The previous prime is 40128149. The next prime is 40128157. The reversal of 40128156 is 65182104.

It is a super-2 number, since 2×401281562 = 3220537807920672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40128157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61126 + ... + 61778.

It is an arithmetic number, because the mean of its divisors is an integer number (2174550).

Almost surely, 240128156 is an apocalyptic number.

It is an amenable number.

40128156 is an abundant number, since it is smaller than the sum of its proper divisors (64250244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40128156 is a wasteful number, since it uses less digits than its factorization.

40128156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 40128156 is about 6334.6788395309. The cubic root of 40128156 is about 342.3600394270.

The spelling of 40128156 in words is "forty million, one hundred twenty-eight thousand, one hundred fifty-six".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 569 653 1138 1306 1707 1959 2276 2612 3414 3918 5121 5877 6828 7836 10242 11754 15363 17631 20484 23508 30726 35262 61452 70524 371557 743114 1114671 1486228 2229342 3344013 4458684 6688026 10032039 13376052 20064078 40128156