390738740 has 120 divisors (see below), whose sum is σ = 978781440. Its totient is φ = 130987584.

The previous prime is 390738739. The next prime is 390738749. The reversal of 390738740 is 47837093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390738749) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3793529 + ... + 3793631.

It is an arithmetic number, because the mean of its divisors is an integer number (8156512).

Almost surely, 2^390738740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390738740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489390720).

390738740 is an abundant number, since it is smaller than the sum of its proper divisors (588042700).

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

390738740 is a wasteful number, since it uses less digits than its factorization.

390738740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 390738740 is about 19767.1125863137. The cubic root of 390738740 is about 731.0753775939.

The spelling of 390738740 in words is "three hundred ninety million, seven hundred thirty-eight thousand, seven hundred forty".