393742380 has 24 divisors (see below), whose sum is σ = 1102478832. Its totient is φ = 104997952.

The previous prime is 393742369. The next prime is 393742397. The reversal of 393742380 is 83247393.

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, 3281127 + ... + 3281246.

It is an arithmetic number, because the mean of its divisors is an integer number (45936618).

Almost surely, 2^393742380 is an apocalyptic number.

393742380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

393742380 is an abundant number, since it is smaller than the sum of its proper divisors (708736452).

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

393742380 is a wasteful number, since it uses less digits than its factorization.

393742380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562385 (or 6562383 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 393742380 is about 19842.9428261032. The cubic root of 393742380 is about 732.9438763084.

The spelling of 393742380 in words is "three hundred ninety-three million, seven hundred forty-two thousand, three hundred eighty".