3891149504 has 42 divisors (see below), whose sum is σ = 8427038772. Its totient is φ = 1767952000.

The previous prime is 3891149491. The next prime is 3891149513. The reversal of 3891149504 is 4059411983.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1653929 + ... + 1656279.

Almost surely, 2^3891149504 is an apocalyptic number.

It is an amenable number.

3891149504 is an abundant number, since it is smaller than the sum of its proper divisors (4535889268).

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

3891149504 is an frugal number, since it uses more digits than its factorization.

3891149504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 3891149504 is about 62379.0790570044. The cubic root of 3891149504 is about 1572.8693122331.

Multiplying 3891149504 by its sum of digits (44), we get a square (171210578176 = 413776²).

3891149504 divided by its sum of digits (44) gives a square (88435216 = 9404²).

The spelling of 3891149504 in words is "three billion, eight hundred ninety-one million, one hundred forty-nine thousand, five hundred four".