383994720 has 72 divisors (see below), whose sum is σ = 1310386896. Its totient is φ = 102398208.

The previous prime is 383994701. The next prime is 383994739. The reversal of 383994720 is 27499383.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (383994701) and next prime (383994739).

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 131892 + ... + 134771.

It is an arithmetic number, because the mean of its divisors is an integer number (18199818).

Almost surely, 2^383994720 is an apocalyptic number.

383994720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

383994720 is an abundant number, since it is smaller than the sum of its proper divisors (926392176).

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

383994720 is a wasteful number, since it uses less digits than its factorization.

383994720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266684 (or 266673 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 383994720 is about 19595.7832198665. The cubic root of 383994720 is about 726.8449057298.

The spelling of 383994720 in words is "three hundred eighty-three million, nine hundred ninety-four thousand, seven hundred twenty".