40161072 has 160 divisors (see below), whose sum is σ = 128563200. Its totient is φ = 10543104.

The previous prime is 40161061. The next prime is 40161091. The reversal of 40161072 is 27016104.

It is a super-2 number, since 2×40161072² = 3225823408378368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451204 + ... + 451292.

It is an arithmetic number, because the mean of its divisors is an integer number (803520).

Almost surely, 2^40161072 is an apocalyptic number.

40161072 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40161072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64281600).

40161072 is an abundant number, since it is smaller than the sum of its proper divisors (88402128).

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

40161072 is a wasteful number, since it uses less digits than its factorization.

40161072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 40161072 is about 6337.2763865875. The cubic root of 40161072 is about 342.4536232871.

Adding to 40161072 its reverse (27016104), we get a palindrome (67177176).

The spelling of 40161072 in words is "forty million, one hundred sixty-one thousand, seventy-two".