3977477638 has 8 divisors (see below), whose sum is σ = 5969480400. Its totient is φ = 1987650840.

The previous prime is 3977477627. The next prime is 3977477659. The reversal of 3977477638 is 8367747793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539413 + ... + 546736.

It is an arithmetic number, because the mean of its divisors is an integer number (746185050).

Almost surely, 2^3977477638 is an apocalyptic number.

3977477638 is a deficient number, since it is larger than the sum of its proper divisors (1992002762).

3977477638 is a wasteful number, since it uses less digits than its factorization.

3977477638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087982.

The product of its digits is 37340352, while the sum is 61.

The square root of 3977477638 is about 63067.2469511711. The cubic root of 3977477638 is about 1584.4161075109.

The spelling of 3977477638 in words is "three billion, nine hundred seventy-seven million, four hundred seventy-seven thousand, six hundred thirty-eight".