19347400728 has 96 divisors (see below), whose sum is σ = 55841011200. Its totient is φ = 6037462464.

The previous prime is 19347400717. The next prime is 19347400729. The reversal of 19347400728 is 82700474391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19347400729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46458 + ... + 202121.

It is an arithmetic number, because the mean of its divisors is an integer number (581677200).

Almost surely, 2^19347400728 is an apocalyptic number.

19347400728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19347400728 is an abundant number, since it is smaller than the sum of its proper divisors (36493610472).

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

19347400728 is a wasteful number, since it uses less digits than its factorization.

19347400728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248661 (or 248654 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 19347400728 in words is "nineteen billion, three hundred forty-seven million, four hundred thousand, seven hundred twenty-eight".