1057949690 has 24 divisors (see below), whose sum is σ = 2215218132. Its totient is φ = 362725440.

The previous prime is 1057949677. The next prime is 1057949693. The reversal of 1057949690 is 969497501.

It can be written as a sum of positive squares in 2 ways, for example, as 1046328409 + 11621281 = 32347^2 + 3409^2 .

It is a super-2 number, since 2×1057949690² = 2238515093142192200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1057949693) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1079051 + ... + 1080030.

Almost surely, 2^1057949690 is an apocalyptic number.

1057949690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1057949690 is an abundant number, since it is smaller than the sum of its proper divisors (1157268442).

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

1057949690 is a wasteful number, since it uses less digits than its factorization.

1057949690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159102 (or 2159095 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 1057949690 is about 32526.1385657751. The cubic root of 1057949690 is about 1018.9550011380.

The spelling of 1057949690 in words is "one billion, fifty-seven million, nine hundred forty-nine thousand, six hundred ninety".