37531312728 has 128 divisors (see below), whose sum is σ = 117660211200. Its totient is φ = 9711576576.

The previous prime is 37531312673. The next prime is 37531312733. The reversal of 37531312728 is 82721313573.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 37531312728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46368 + ... + 277871.

It is an arithmetic number, because the mean of its divisors is an integer number (919220400).

Almost surely, 2^37531312728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37531312728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58830105600).

37531312728 is an abundant number, since it is smaller than the sum of its proper divisors (80128898472).

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

37531312728 is a wasteful number, since it uses less digits than its factorization.

37531312728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324321 (or 324317 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The spelling of 37531312728 in words is "thirty-seven billion, five hundred thirty-one million, three hundred twelve thousand, seven hundred twenty-eight".