387489972 has 12 divisors (see below), whose sum is σ = 904143296. Its totient is φ = 129163320.

The previous prime is 387489961. The next prime is 387489989. The reversal of 387489972 is 279984783.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16145404 + ... + 16145427.

Almost surely, 2^387489972 is an apocalyptic number.

It is an amenable number.

387489972 is an abundant number, since it is smaller than the sum of its proper divisors (516653324).

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

387489972 is a wasteful number, since it uses less digits than its factorization.

387489972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32290838 (or 32290836 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The square root of 387489972 is about 19684.7649719269. The cubic root of 387489972 is about 729.0435789025.

The spelling of 387489972 in words is "three hundred eighty-seven million, four hundred eighty-nine thousand, nine hundred seventy-two".