387987240 has 32 divisors (see below), whose sum is σ = 1163962080. Its totient is φ = 103463232.

The previous prime is 387987233. The next prime is 387987251. The reversal of 387987240 is 42789783.

It is a self number, because there is not a number n which added to its sum of digits gives 387987240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1616494 + ... + 1616733.

It is an arithmetic number, because the mean of its divisors is an integer number (36373815).

Almost surely, 2^387987240 is an apocalyptic number.

387987240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

387987240 is an abundant number, since it is smaller than the sum of its proper divisors (775974840).

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

387987240 is a wasteful number, since it uses less digits than its factorization.

387987240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233241 (or 3233237 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 387987240 is about 19697.3917055025. The cubic root of 387987240 is about 729.3553074633.

It can be divided in two parts, 3879 and 87240, that added together give a palindrome (91119).

The spelling of 387987240 in words is "three hundred eighty-seven million, nine hundred eighty-seven thousand, two hundred forty".