3997252140 has 96 divisors (see below), whose sum is σ = 12856402944. Its totient is φ = 909000960.

The previous prime is 3997252111. The next prime is 3997252157. The reversal of 3997252140 is 412527993.

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

It is a junction number, because it is equal to n+sod(n) for n = 3997252092 and 3997252101.

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, 58585 + ... + 106895.

It is an arithmetic number, because the mean of its divisors is an integer number (133920864).

Almost surely, 2^3997252140 is an apocalyptic number.

3997252140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3997252140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6428201472).

3997252140 is an abundant number, since it is smaller than the sum of its proper divisors (8859150804).

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

3997252140 is a wasteful number, since it uses less digits than its factorization.

3997252140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48527 (or 48525 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 3997252140 is about 63223.8257304950. The cubic root of 3997252140 is about 1587.0374723788.

The spelling of 3997252140 in words is "three billion, nine hundred ninety-seven million, two hundred fifty-two thousand, one hundred forty".