40038902 has 4 divisors (see below), whose sum is σ = 60058356. Its totient is φ = 20019450.

The previous prime is 40038839. The next prime is 40038907. The reversal of 40038902 is 20983004.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×40038902² = 3206227346731208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40038907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009724 + ... + 10009727.

It is an arithmetic number, because the mean of its divisors is an integer number (15014589).

Almost surely, 2^40038902 is an apocalyptic number.

40038902 is a deficient number, since it is larger than the sum of its proper divisors (20019454).

40038902 is a wasteful number, since it uses less digits than its factorization.

40038902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20019453.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40038902 is about 6327.6300460757. The cubic root of 40038902 is about 342.1060225533.

The spelling of 40038902 in words is "forty million, thirty-eight thousand, nine hundred two".