3977291376 has 80 divisors (see below), whose sum is σ = 11912689920. Its totient is φ = 1268118720.

The previous prime is 3977291371. The next prime is 3977291377. The reversal of 3977291376 is 6731927793.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977291371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190210 + ... + 210081.

It is an arithmetic number, because the mean of its divisors is an integer number (148908624).

Almost surely, 2^3977291376 is an apocalyptic number.

3977291376 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3977291376 is an abundant number, since it is smaller than the sum of its proper divisors (7935398544).

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

3977291376 is a wasteful number, since it uses less digits than its factorization.

3977291376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400331 (or 400319 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 54.

The square root of 3977291376 is about 63065.7702402817. The cubic root of 3977291376 is about 1584.3913748246.

The spelling of 3977291376 in words is "three billion, nine hundred seventy-seven million, two hundred ninety-one thousand, three hundred seventy-six".