40138576 has 20 divisors (see below), whose sum is σ = 77980500. Its totient is φ = 20014592.

The previous prime is 40138529. The next prime is 40138577. The reversal of 40138576 is 67583104.

It can be written as a sum of positive squares in 2 ways, for example, as 26625600 + 13512976 = 5160^2 + 3676^2 .

It is a super-2 number, since 2×40138576² = 3222210566615552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (3899025).

Almost surely, 2^40138576 is an apocalyptic number.

It is an amenable number.

40138576 is a deficient number, since it is larger than the sum of its proper divisors (37841924).

40138576 is a wasteful number, since it uses less digits than its factorization.

40138576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846 (or 6840 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 40138576 is about 6335.5012429957. The cubic root of 40138576 is about 342.3896701836.

The spelling of 40138576 in words is "forty million, one hundred thirty-eight thousand, five hundred seventy-six".