263378540 has 24 divisors (see below), whose sum is σ = 555478560. Its totient is φ = 104897408.

The previous prime is 263378491. The next prime is 263378561. The reversal of 263378540 is 45873362.

It is a junction number, because it is equal to n+sod(n) for n = 263378494 and 263378503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23600 + ... + 32919.

It is an arithmetic number, because the mean of its divisors is an integer number (23144940).

Almost surely, 2^263378540 is an apocalyptic number.

263378540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263378540 is an abundant number, since it is smaller than the sum of its proper divisors (292100020).

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

263378540 is a wasteful number, since it uses less digits than its factorization.

263378540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56761 (or 56759 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 263378540 is about 16228.9414318988. The cubic root of 263378540 is about 641.0030982057.

The spelling of 263378540 in words is "two hundred sixty-three million, three hundred seventy-eight thousand, five hundred forty".