1013981720 has 16 divisors (see below), whose sum is σ = 2281458960. Its totient is φ = 405592672.

The previous prime is 1013981699. The next prime is 1013981737. The reversal of 1013981720 is 271893101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12674732 + ... + 12674811.

It is an arithmetic number, because the mean of its divisors is an integer number (142591185).

Almost surely, 2^1013981720 is an apocalyptic number.

1013981720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013981720 is an abundant number, since it is smaller than the sum of its proper divisors (1267477240).

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

1013981720 is a wasteful number, since it uses less digits than its factorization.

1013981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25349554 (or 25349550 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1013981720 is about 31843.0796249358. The cubic root of 1013981720 is about 1004.6390195529.

The spelling of 1013981720 in words is "one billion, thirteen million, nine hundred eighty-one thousand, seven hundred twenty".