3958781040 has 120 divisors (see below), whose sum is σ = 13787377968. Its totient is φ = 1055669760.

The previous prime is 3958781027. The next prime is 3958781059. The reversal of 3958781040 is 401878593.

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, 82381 + ... + 121260.

Almost surely, 2^3958781040 is an apocalyptic number.

3958781040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3958781040 is an abundant number, since it is smaller than the sum of its proper divisors (9828596928).

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

3958781040 is a wasteful number, since it uses less digits than its factorization.

3958781040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203669 (or 203651 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 3958781040 is about 62918.8448717870. The cubic root of 3958781040 is about 1581.9296298085.

The spelling of 3958781040 in words is "three billion, nine hundred fifty-eight million, seven hundred eighty-one thousand, forty".