387308790 has 160 divisors (see below), whose sum is σ = 1203405984. Its totient is φ = 88335360.

The previous prime is 387308777. The next prime is 387308849. The reversal of 387308790 is 97803783.

It is a super-2 number, since 2×387308790² = 300016197622528200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 150192 + ... + 152748.

Almost surely, 2^387308790 is an apocalyptic number.

387308790 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 387308790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601702992).

387308790 is an abundant number, since it is smaller than the sum of its proper divisors (816097194).

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

387308790 is a wasteful number, since it uses less digits than its factorization.

387308790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 387308790 is about 19680.1623468913. The cubic root of 387308790 is about 728.9299328075.

The spelling of 387308790 in words is "three hundred eighty-seven million, three hundred eight thousand, seven hundred ninety".