387444790 has 16 divisors (see below), whose sum is σ = 738424512. Its totient is φ = 145861504.

The previous prime is 387444781. The next prime is 387444823. The reversal of 387444790 is 97444783.

It is a super-2 number, since 2×387444790² = 300226930596288200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 387444790.

It is a congruent number.

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, 1139374 + ... + 1139713.

It is an arithmetic number, because the mean of its divisors is an integer number (46151532).

Almost surely, 2^387444790 is an apocalyptic number.

387444790 is a deficient number, since it is larger than the sum of its proper divisors (350979722).

387444790 is a wasteful number, since it uses less digits than its factorization.

387444790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279111.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 387444790 is about 19683.6172996734. The cubic root of 387444790 is about 729.0152418876.

It can be divided in two parts, 38744 and 4790, that added together give a palindrome (43534).

The spelling of 387444790 in words is "three hundred eighty-seven million, four hundred forty-four thousand, seven hundred ninety".