3997241040 has 80 divisors (see below), whose sum is σ = 13344645888. Its totient is φ = 983935488.

The previous prime is 3997240993. The next prime is 3997241041. The reversal of 3997241040 is 401427993.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 3997241040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997241041) 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, 637464 + ... + 643703.

Almost surely, 2^3997241040 is an apocalyptic number.

3997241040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3997241040 is an abundant number, since it is smaller than the sum of its proper divisors (9347404848).

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

3997241040 is a wasteful number, since it uses less digits than its factorization.

3997241040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281196 (or 1281190 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 3997241040 is about 63223.7379470717. The cubic root of 3997241040 is about 1587.0360033586.

The spelling of 3997241040 in words is "three billion, nine hundred ninety-seven million, two hundred forty-one thousand, forty".