23891406 has 32 divisors (see below), whose sum is σ = 59574528. Its totient is φ = 6205440.

The previous prime is 23891353. The next prime is 23891407. The reversal of 23891406 is 60419832.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23891407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25395 + ... + 26318.

It is an arithmetic number, because the mean of its divisors is an integer number (1861704).

Almost surely, 2^23891406 is an apocalyptic number.

23891406 is an abundant number, since it is smaller than the sum of its proper divisors (35683122).

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

23891406 is a wasteful number, since it uses less digits than its factorization.

23891406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51736.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 23891406 is about 4887.8835910852. The cubic root of 23891406 is about 288.0142016531.

The spelling of 23891406 in words is "twenty-three million, eight hundred ninety-one thousand, four hundred six".