390874840 has 32 divisors (see below), whose sum is σ = 925758000. Its totient is φ = 148120704.

The previous prime is 390874819. The next prime is 390874849. The reversal of 390874840 is 48478093.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390874849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256395 + ... + 257914.

Almost surely, 2^390874840 is an apocalyptic number.

It is an amenable number.

390874840 is an abundant number, since it is smaller than the sum of its proper divisors (534883160).

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

390874840 is a wasteful number, since it uses less digits than its factorization.

390874840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514339 (or 514335 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 390874840 is about 19770.5548733464. The cubic root of 390874840 is about 731.1602491450.

The spelling of 390874840 in words is "three hundred ninety million, eight hundred seventy-four thousand, eight hundred forty".