1331477980 has 48 divisors (see below), whose sum is σ = 3260779200. Its totient is φ = 456504384.

The previous prime is 1331477971. The next prime is 1331478007. The reversal of 1331477980 is 897741331.

It is a super-2 number, since 2×1331477980² = 3545667222449760800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90187 + ... + 103906.

It is an arithmetic number, because the mean of its divisors is an integer number (67932900).

Almost surely, 2^1331477980 is an apocalyptic number.

1331477980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331477980 is an abundant number, since it is smaller than the sum of its proper divisors (1929301220).

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

1331477980 is a wasteful number, since it uses less digits than its factorization.

1331477980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194123 (or 194107 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 1331477980 is about 36489.4228510126. The cubic root of 1331477980 is about 1100.1316591722.

The spelling of 1331477980 in words is "one billion, three hundred thirty-one million, four hundred seventy-seven thousand, nine hundred eighty".