1580226940 has 12 divisors (see below), whose sum is σ = 3318476616. Its totient is φ = 632090768.

The previous prime is 1580226919. The next prime is 1580226943. The reversal of 1580226940 is 496220851.

It is a self number, because there is not a number n which added to its sum of digits gives 1580226940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1580226943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39505654 + ... + 39505693.

It is an arithmetic number, because the mean of its divisors is an integer number (276539718).

Almost surely, 2^1580226940 is an apocalyptic number.

1580226940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1580226940 is an abundant number, since it is smaller than the sum of its proper divisors (1738249676).

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

1580226940 is a wasteful number, since it uses less digits than its factorization.

1580226940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79011356 (or 79011354 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1580226940 is about 39752.0683738595. The cubic root of 1580226940 is about 1164.7690455621.

The spelling of 1580226940 in words is "one billion, five hundred eighty million, two hundred twenty-six thousand, nine hundred forty".