3970178640 has 120 divisors (see below), whose sum is σ = 14117531688. Its totient is φ = 996433920.

The previous prime is 3970178579. The next prime is 3970178659. The reversal of 3970178640 is 468710793.

It can be written as a sum of positive squares in 4 ways, for example, as 1045099584 + 2925079056 = 32328^2 + 54084^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149941 + ... + 174420.

Almost surely, 2^3970178640 is an apocalyptic number.

3970178640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3970178640 is an abundant number, since it is smaller than the sum of its proper divisors (10147353048).

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

3970178640 is a wasteful number, since it uses less digits than its factorization.

3970178640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324397 (or 324388 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 3970178640 is about 63009.3535913518. The cubic root of 3970178640 is about 1583.4463361884.

It can be divided in two parts, 39701 and 78640, that added together give a triangular number (118341 = T₄₈₆).

The spelling of 3970178640 in words is "three billion, nine hundred seventy million, one hundred seventy-eight thousand, six hundred forty".