40072806 has 20 divisors (see below), whose sum is σ = 89793132. Its totient is φ = 13357548.

The previous prime is 40072793. The next prime is 40072817. The reversal of 40072806 is 60827004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40072806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 123520 + ... + 123843.

Almost surely, 2^40072806 is an apocalyptic number.

40072806 is an abundant number, since it is smaller than the sum of its proper divisors (49720326).

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

40072806 is a wasteful number, since it uses less digits than its factorization.

40072806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247377 (or 247368 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40072806 is about 6330.3085232870. The cubic root of 40072806 is about 342.2025577536.

The spelling of 40072806 in words is "forty million, seventy-two thousand, eight hundred six".