263430864 has 60 divisors (see below), whose sum is σ = 752945856. Its totient is φ = 85939776.

The previous prime is 263430851. The next prime is 263430883. The reversal of 263430864 is 468034362.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12694 + ... + 26229.

Almost surely, 2^263430864 is an apocalyptic number.

263430864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

263430864 is an abundant number, since it is smaller than the sum of its proper divisors (489514992).

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

263430864 is a wasteful number, since it uses less digits than its factorization.

263430864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38984 (or 38975 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 263430864 is about 16230.5534101583. The cubic root of 263430864 is about 641.0455436093.

It can be divided in two parts, 26 and 3430864, that added together give a triangular number (3430890 = T₂₆₁₉).

The spelling of 263430864 in words is "two hundred sixty-three million, four hundred thirty thousand, eight hundred sixty-four".