40490736 has 160 divisors (see below), whose sum is σ = 130491648. Its totient is φ = 10629120.

The previous prime is 40490731. The next prime is 40490759. The reversal of 40490736 is 63709404.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 40490697 and 40490706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40490731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116515 + ... + 116861.

Almost surely, 2^40490736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40490736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65245824).

40490736 is an abundant number, since it is smaller than the sum of its proper divisors (90000912).

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

40490736 is a wasteful number, since it uses less digits than its factorization.

40490736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 40490736 is about 6363.2331404719. The cubic root of 40490736 is about 343.3880864909.

The spelling of 40490736 in words is "forty million, four hundred ninety thousand, seven hundred thirty-six".