263874390 has 32 divisors (see below), whose sum is σ = 682014816. Its totient is φ = 64953600.

The previous prime is 263874389. The next prime is 263874397. The reversal of 263874390 is 93478362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263874397) 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, 337911 + ... + 338690.

It is an arithmetic number, because the mean of its divisors is an integer number (21312963).

Almost surely, 2^263874390 is an apocalyptic number.

263874390 is an abundant number, since it is smaller than the sum of its proper divisors (418140426).

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

263874390 is a wasteful number, since it uses less digits than its factorization.

263874390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676624.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 263874390 is about 16244.2109688344. The cubic root of 263874390 is about 641.4051078418.

It can be divided in two parts, 2638 and 74390, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 263874390 in words is "two hundred sixty-three million, eight hundred seventy-four thousand, three hundred ninety".