1308745440 has 72 divisors (see below), whose sum is σ = 4466098728. Its totient is φ = 348998400.

The previous prime is 1308745397. The next prime is 1308745447. The reversal of 1308745440 is 445478031.

1308745440 is a `hidden beast` number, since 1 + 30 + 87 + 4 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a junction number, because it is equal to n+sod(n) for n = 1308745395 and 1308745404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308745447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452986 + ... + 455865.

It is an arithmetic number, because the mean of its divisors is an integer number (62029149).

Almost surely, 2^1308745440 is an apocalyptic number.

1308745440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1308745440 is an abundant number, since it is smaller than the sum of its proper divisors (3157353288).

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

1308745440 is a wasteful number, since it uses less digits than its factorization.

1308745440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908872 (or 908861 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1308745440 is about 36176.5869036868. The cubic root of 1308745440 is about 1093.8347772545.

The spelling of 1308745440 in words is "one billion, three hundred eight million, seven hundred forty-five thousand, four hundred forty".