23378390 has 24 divisors (see below), whose sum is σ = 48952512. Its totient is φ = 8015280.

The previous prime is 23378387. The next prime is 23378393. The reversal of 23378390 is 9387332.

It is an interprime number because it is at equal distance from previous prime (23378387) and next prime (23378393).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 23378390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23378393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23366 + ... + 24345.

It is an arithmetic number, because the mean of its divisors is an integer number (2039688).

Almost surely, 2^23378390 is an apocalyptic number.

23378390 is an abundant number, since it is smaller than the sum of its proper divisors (25574122).

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

23378390 is a wasteful number, since it uses less digits than its factorization.

23378390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47732 (or 47725 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 23378390 is about 4835.1204741971. The cubic root of 23378390 is about 285.9377747815.

The spelling of 23378390 in words is "twenty-three million, three hundred seventy-eight thousand, three hundred ninety".