387781130 has 32 divisors (see below), whose sum is σ = 762274368. Its totient is φ = 140860800.

The previous prime is 387781111. The next prime is 387781133. The reversal of 387781130 is 31187783.

It is not an unprimeable number, because it can be changed into a prime (387781133) 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, 191825 + ... + 193835.

It is an arithmetic number, because the mean of its divisors is an integer number (23821074).

Almost surely, 2^387781130 is an apocalyptic number.

387781130 is a deficient number, since it is larger than the sum of its proper divisors (374493238).

387781130 is a wasteful number, since it uses less digits than its factorization.

387781130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 387781130 is about 19692.1590994995. The cubic root of 387781130 is about 729.2261330694.

The spelling of 387781130 in words is "three hundred eighty-seven million, seven hundred eighty-one thousand, one hundred thirty".