38542990 has 16 divisors (see below), whose sum is σ = 69684480. Its totient is φ = 15348960.

The previous prime is 38542981. The next prime is 38542991. The reversal of 38542990 is 9924583.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38542991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6126 + ... + 10705.

It is an arithmetic number, because the mean of its divisors is an integer number (4355280).

Almost surely, 2^38542990 is an apocalyptic number.

38542990 is a deficient number, since it is larger than the sum of its proper divisors (31141490).

38542990 is a wasteful number, since it uses less digits than its factorization.

38542990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17067.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 38542990 is about 6208.3000893965. The cubic root of 38542990 is about 337.7913058778.

The spelling of 38542990 in words is "thirty-eight million, five hundred forty-two thousand, nine hundred ninety".