387393440 has 48 divisors (see below), whose sum is σ = 1045965312. Its totient is φ = 132820224.

The previous prime is 387393437. The next prime is 387393443. The reversal of 387393440 is 44393783.

It is an interprime number because it is at equal distance from previous prime (387393437) and next prime (387393443).

It is not an unprimeable number, because it can be changed into a prime (387393443) 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, 171824 + ... + 174063.

It is an arithmetic number, because the mean of its divisors is an integer number (21790944).

Almost surely, 2^387393440 is an apocalyptic number.

It is an amenable number.

387393440 is an abundant number, since it is smaller than the sum of its proper divisors (658571872).

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

387393440 is a wasteful number, since it uses less digits than its factorization.

387393440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345909 (or 345901 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 387393440 is about 19682.3128722211. The cubic root of 387393440 is about 728.9830337833.

The spelling of 387393440 in words is "three hundred eighty-seven million, three hundred ninety-three thousand, four hundred forty".