387907972 has 48 divisors (see below), whose sum is σ = 754427520. Its totient is φ = 173583872.

The previous prime is 387907943. The next prime is 387907979. The reversal of 387907972 is 279709783.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (387907979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307479 + ... + 308737.

It is an arithmetic number, because the mean of its divisors is an integer number (15717240).

Almost surely, 2^387907972 is an apocalyptic number.

It is an amenable number.

387907972 is a deficient number, since it is larger than the sum of its proper divisors (366519548).

387907972 is a wasteful number, since it uses less digits than its factorization.

387907972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 52.

The square root of 387907972 is about 19695.3794581369. The cubic root of 387907972 is about 729.3056336010.

The spelling of 387907972 in words is "three hundred eighty-seven million, nine hundred seven thousand, nine hundred seventy-two".