387772490 has 32 divisors (see below), whose sum is σ = 823440384. Its totient is φ = 128661120.

The previous prime is 387772487. The next prime is 387772507. The reversal of 387772490 is 94277783.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87179 + ... + 91518.

It is an arithmetic number, because the mean of its divisors is an integer number (25732512).

Almost surely, 2^387772490 is an apocalyptic number.

387772490 is an abundant number, since it is smaller than the sum of its proper divisors (435667894).

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

387772490 is a wasteful number, since it uses less digits than its factorization.

387772490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178742.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 387772490 is about 19691.9397216221. The cubic root of 387772490 is about 729.2207171616.

It can be divided in two parts, 3877 and 72490, that added together give a palindrome (76367).

The spelling of 387772490 in words is "three hundred eighty-seven million, seven hundred seventy-two thousand, four hundred ninety".