75921940 has 12 divisors (see below), whose sum is σ = 159436116. Its totient is φ = 30368768.

The previous prime is 75921899. The next prime is 75921953. The reversal of 75921940 is 4912957.

It can be written as a sum of positive squares in 2 ways, for example, as 23677956 + 52243984 = 4866^2 + 7228^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 75921940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898029 + ... + 1898068.

It is an arithmetic number, because the mean of its divisors is an integer number (13286343).

Almost surely, 2^75921940 is an apocalyptic number.

It is an amenable number.

75921940 is an abundant number, since it is smaller than the sum of its proper divisors (83514176).

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

75921940 is a wasteful number, since it uses less digits than its factorization.

75921940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796106 (or 3796104 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 75921940 is about 8713.3196888442. The cubic root of 75921940 is about 423.4372875232.

The spelling of 75921940 in words is "seventy-five million, nine hundred twenty-one thousand, nine hundred forty".