13987734780 has 48 divisors (see below), whose sum is σ = 39193691040. Its totient is φ = 3727392768.

The previous prime is 13987734767. The next prime is 13987734799. The reversal of 13987734780 is 8743778931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13987734780.

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, 1812 + ... + 167268.

It is an arithmetic number, because the mean of its divisors is an integer number (816535230).

Almost surely, 2^13987734780 is an apocalyptic number.

13987734780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13987734780 is an abundant number, since it is smaller than the sum of its proper divisors (25205956260).

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

13987734780 is a wasteful number, since it uses less digits than its factorization.

13987734780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166878 (or 166876 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 13987734780 in words is "thirteen billion, nine hundred eighty-seven million, seven hundred thirty-four thousand, seven hundred eighty".