23491378 has 4 divisors (see below), whose sum is σ = 35237070. Its totient is φ = 11745688.

The previous prime is 23491367. The next prime is 23491387. The reversal of 23491378 is 87319432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21409129 + 2082249 = 4627^2 + 1443^2 .

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 as a sum of consecutive naturals, namely, 5872843 + ... + 5872846.

Almost surely, 2^23491378 is an apocalyptic number.

23491378 is a deficient number, since it is larger than the sum of its proper divisors (11745692).

23491378 is a wasteful number, since it uses less digits than its factorization.

23491378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745691.

The product of its digits is 36288, while the sum is 37.

The square root of 23491378 is about 4846.7904844340. The cubic root of 23491378 is about 286.3976814024.

It can be divided in two parts, 23 and 491378, that added together give a square (491401 = 701²).

The spelling of 23491378 in words is "twenty-three million, four hundred ninety-one thousand, three hundred seventy-eight".