1957266290 has 24 divisors (see below), whose sum is σ = 4098276972. Its totient is φ = 671062560.

The previous prime is 1957266281. The next prime is 1957266307. The reversal of 1957266290 is 926627591.

It can be written as a sum of positive squares in 2 ways, for example, as 1919578969 + 37687321 = 43813^2 + 6139^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1996721 + ... + 1997700.

Almost surely, 2^1957266290 is an apocalyptic number.

1957266290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1957266290 is an abundant number, since it is smaller than the sum of its proper divisors (2141010682).

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

1957266290 is a wasteful number, since it uses less digits than its factorization.

1957266290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994442 (or 3994435 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1957266290 is about 44241.0023620623. The cubic root of 1957266290 is about 1250.8828515118.

The spelling of 1957266290 in words is "one billion, nine hundred fifty-seven million, two hundred sixty-six thousand, two hundred ninety".