52783857 has 48 divisors (see below), whose sum is σ = 91203840. Its totient is φ = 28780416.

The previous prime is 52783831. The next prime is 52783879. The reversal of 52783857 is 75838725.

It is not a de Polignac number, because 52783857 - 2¹⁵ = 52751089 is a prime.

It is a super-2 number, since 2×52783857² = 5572271119592898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52783897) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 305023 + ... + 305195.

It is an arithmetic number, because the mean of its divisors is an integer number (1900080).

Almost surely, 2^52783857 is an apocalyptic number.

52783857 is the 3633-rd decagonal number.

It is an amenable number.

52783857 is a deficient number, since it is larger than the sum of its proper divisors (38419983).

52783857 is a wasteful number, since it uses less digits than its factorization.

52783857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 379 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 52783857 is about 7265.2499612883. The cubic root of 52783857 is about 375.1172540002.

The spelling of 52783857 in words is "fifty-two million, seven hundred eighty-three thousand, eight hundred fifty-seven".