1957040778 has 64 divisors (see below), whose sum is σ = 5011826688. Its totient is φ = 494579520.

The previous prime is 1957040777. The next prime is 1957040779. The reversal of 1957040778 is 8770407591.

It is an interprime number because it is at equal distance from previous prime (1957040777) and next prime (1957040779).

It is not an unprimeable number, because it can be changed into a prime (1957040777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40150 + ... + 74337.

It is an arithmetic number, because the mean of its divisors is an integer number (78309792).

Almost surely, 2^1957040778 is an apocalyptic number.

1957040778 is an abundant number, since it is smaller than the sum of its proper divisors (3054785910).

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

1957040778 is a wasteful number, since it uses less digits than its factorization.

1957040778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114547.

The product of its (nonzero) digits is 493920, while the sum is 48.

The square root of 1957040778 is about 44238.4536122139. The cubic root of 1957040778 is about 1250.8348083253.

The spelling of 1957040778 in words is "one billion, nine hundred fifty-seven million, forty thousand, seven hundred seventy-eight".