38961870 has 32 divisors (see below), whose sum is σ = 95686272. Its totient is φ = 10147872.

The previous prime is 38961869. The next prime is 38961887. The reversal of 38961870 is 7816983.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13812 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (2990196).

Almost surely, 2^38961870 is an apocalyptic number.

38961870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38961870 is an abundant number, since it is smaller than the sum of its proper divisors (56724402).

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

38961870 is a wasteful number, since it uses less digits than its factorization.

38961870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30256.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 38961870 is about 6241.9444085958. The cubic root of 38961870 is about 339.0105895527.

The spelling of 38961870 in words is "thirty-eight million, nine hundred sixty-one thousand, eight hundred seventy".