23778705 has 16 divisors (see below), whose sum is σ = 39273984. Its totient is φ = 12272640.

The previous prime is 23778691. The next prime is 23778719. The reversal of 23778705 is 50787732.

It is an interprime number because it is at equal distance from previous prime (23778691) and next prime (23778719).

It is not a de Polignac number, because 23778705 - 2⁶ = 23778641 is a prime.

It is a super-2 number, since 2×23778705² = 1130853622954050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25104 + ... + 26033.

It is an arithmetic number, because the mean of its divisors is an integer number (2454624).

Almost surely, 2^23778705 is an apocalyptic number.

It is an amenable number.

23778705 is a deficient number, since it is larger than the sum of its proper divisors (15495279).

23778705 is a wasteful number, since it uses less digits than its factorization.

23778705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51176.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 23778705 is about 4876.3413539251. The cubic root of 23778705 is about 287.5606122993.

The spelling of 23778705 in words is "twenty-three million, seven hundred seventy-eight thousand, seven hundred five".