38403390 has 16 divisors (see below), whose sum is σ = 92168208. Its totient is φ = 10240896.

The previous prime is 38403361. The next prime is 38403433. The reversal of 38403390 is 9330483.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1280113 = 38403390 / (3 + 8 + 4 + 0 + 3 + 3 + 9 + 0).

It is a Curzon number.

It is a congruent number.

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, 640027 + ... + 640086.

It is an arithmetic number, because the mean of its divisors is an integer number (5760513).

Almost surely, 2^38403390 is an apocalyptic number.

38403390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38403390 is an abundant number, since it is smaller than the sum of its proper divisors (53764818).

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

38403390 is a wasteful number, since it uses less digits than its factorization.

38403390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280123.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 38403390 is about 6197.0468773441. The cubic root of 38403390 is about 337.3829937339.

The spelling of 38403390 in words is "thirty-eight million, four hundred three thousand, three hundred ninety".