263572380 has 144 divisors (see below), whose sum is σ = 836375904. Its totient is φ = 69672960.

The previous prime is 263572363. The next prime is 263572417. The reversal of 263572380 is 83275362.

263572380 is a `hidden beast` number, since 2 + 6 + 3 + 572 + 3 + 80 = 666.

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 47 ways as a sum of consecutive naturals, for example, 937840 + ... + 938120.

It is an arithmetic number, because the mean of its divisors is an integer number (5808166).

Almost surely, 2^263572380 is an apocalyptic number.

263572380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263572380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418187952).

263572380 is an abundant number, since it is smaller than the sum of its proper divisors (572803524).

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

263572380 is a wasteful number, since it uses less digits than its factorization.

263572380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 263572380 is about 16234.9123804226. The cubic root of 263572380 is about 641.1603137111.

The spelling of 263572380 in words is "two hundred sixty-three million, five hundred seventy-two thousand, three hundred eighty".