40138626 has 16 divisors (see below), whose sum is σ = 87575328. Its totient is φ = 12163200.

The previous prime is 40138607. The next prime is 40138661. The reversal of 40138626 is 62683104.

It is a super-2 number, since 2×40138626² = 3222218594335752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40138593 and 40138602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304015 + ... + 304146.

It is an arithmetic number, because the mean of its divisors is an integer number (5473458).

Almost surely, 2^40138626 is an apocalyptic number.

40138626 is an abundant number, since it is smaller than the sum of its proper divisors (47436702).

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

40138626 is a wasteful number, since it uses less digits than its factorization.

40138626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608177.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40138626 is about 6335.5051890122. The cubic root of 40138626 is about 342.3898123534.

The spelling of 40138626 in words is "forty million, one hundred thirty-eight thousand, six hundred twenty-six".