23478420 has 48 divisors (see below), whose sum is σ = 75132288. Its totient is φ = 5366400.

The previous prime is 23478419. The next prime is 23478457. The reversal of 23478420 is 2487432.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27531 + ... + 28370.

It is an arithmetic number, because the mean of its divisors is an integer number (1565256).

Almost surely, 2^23478420 is an apocalyptic number.

23478420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23478420 is an abundant number, since it is smaller than the sum of its proper divisors (51653868).

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

23478420 is a wasteful number, since it uses less digits than its factorization.

23478420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55920 (or 55918 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 23478420 is about 4845.4535391437. The cubic root of 23478420 is about 286.3450120964.

The spelling of 23478420 in words is "twenty-three million, four hundred seventy-eight thousand, four hundred twenty".