3725961978 has 48 divisors (see below), whose sum is σ = 8332765920. Its totient is φ = 1107396864.

The previous prime is 3725961919. The next prime is 3725962003. The reversal of 3725961978 is 8791695273.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23601 + ... + 89492.

It is an arithmetic number, because the mean of its divisors is an integer number (173599290).

Almost surely, 2^3725961978 is an apocalyptic number.

3725961978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3725961978 is an abundant number, since it is smaller than the sum of its proper divisors (4606803942).

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

3725961978 is a wasteful number, since it uses less digits than its factorization.

3725961978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113151 (or 113134 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 57.

The square root of 3725961978 is about 61040.6584007742. The cubic root of 3725961978 is about 1550.2895023589.

The spelling of 3725961978 in words is "three billion, seven hundred twenty-five million, nine hundred sixty-one thousand, nine hundred seventy-eight".