23778738 has 16 divisors (see below), whose sum is σ = 52841760. Its totient is φ = 7926228.

The previous prime is 23778719. The next prime is 23778739. The reversal of 23778738 is 83787732.

It is a junction number, because it is equal to n+sod(n) for n = 23778693 and 23778702.

It is not an unprimeable number, because it can be changed into a prime (23778739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220120 + ... + 220227.

It is an arithmetic number, because the mean of its divisors is an integer number (3302610).

Almost surely, 2^23778738 is an apocalyptic number.

23778738 is an abundant number, since it is smaller than the sum of its proper divisors (29063022).

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

23778738 is a wasteful number, since it uses less digits than its factorization.

23778738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440358 (or 440352 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 23778738 is about 4876.3447376083. The cubic root of 23778738 is about 287.5607453244.

The spelling of 23778738 in words is "twenty-three million, seven hundred seventy-eight thousand, seven hundred thirty-eight".