1057820 has 24 divisors (see below), whose sum is σ = 2240784. Its totient is φ = 419456.

The previous prime is 1057807. The next prime is 1057831. The reversal of 1057820 is 287501.

It is a super-2 number, since 2×1057820² = 2237966304800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4424 + ... + 4656.

It is an arithmetic number, because the mean of its divisors is an integer number (93366).

2^1057820 is an apocalyptic number.

1057820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1057820 is an abundant number, since it is smaller than the sum of its proper divisors (1182964).

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

1057820 is a wasteful number, since it uses less digits than its factorization.

1057820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1057820 is about 1028.5037676159. The cubic root of 1057820 is about 101.8913362840.

The spelling of 1057820 in words is "one million, fifty-seven thousand, eight hundred twenty".