308072040 has 128 divisors (see below), whose sum is σ = 958780800. Its totient is φ = 79139840.

The previous prime is 308072033. The next prime is 308072069. The reversal of 308072040 is 40270803.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 308072040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374830 + ... + 375650.

It is an arithmetic number, because the mean of its divisors is an integer number (7490475).

Almost surely, 2^308072040 is an apocalyptic number.

308072040 is a gapful number since it is divisible by the number (30) 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 308072040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479390400).

308072040 is an abundant number, since it is smaller than the sum of its proper divisors (650708760).

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

308072040 is a wasteful number, since it uses less digits than its factorization.

308072040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 308072040 is about 17551.9810847665. The cubic root of 308072040 is about 675.3839900214.

The spelling of 308072040 in words is "three hundred eight million, seventy-two thousand, forty".