40155290 has 16 divisors (see below), whose sum is σ = 82605312. Its totient is φ = 13767504.

The previous prime is 40155289. The next prime is 40155301. The reversal of 40155290 is 9255104.

It is a super-2 number, since 2×40155290² = 3224894629968200, which contains 22 as substring.

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, 286754 + ... + 286893.

It is an arithmetic number, because the mean of its divisors is an integer number (5162832).

Almost surely, 2^40155290 is an apocalyptic number.

40155290 is an abundant number, since it is smaller than the sum of its proper divisors (42450022).

40155290 is a wasteful number, since it uses less digits than its factorization.

40155290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573661.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 40155290 is about 6336.8201805006. The cubic root of 40155290 is about 342.4371881192.

The spelling of 40155290 in words is "forty million, one hundred fifty-five thousand, two hundred ninety".