857228629492 has 12 divisors (see below), whose sum is σ = 1501636877860. Its totient is φ = 428189521536.

The previous prime is 857228629363. The next prime is 857228629531. The reversal of 857228629492 is 294926822758.

It can be written as a sum of positive squares in 2 ways, for example, as 515101902436 + 342126727056 = 717706^2 + 584916^2 .

It is a super-2 number, since 2×857228629492² (a number of 25 digits) 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 3 ways as a sum of consecutive naturals, for example, 106193763 + ... + 106201834.

Almost surely, 2^857228629492 is an apocalyptic number.

It is an amenable number.

857228629492 is a deficient number, since it is larger than the sum of its proper divisors (644408248368).

857228629492 is a wasteful number, since it uses less digits than its factorization.

857228629492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212396610 (or 212396608 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 64.

The spelling of 857228629492 in words is "eight hundred fifty-seven billion, two hundred twenty-eight million, six hundred twenty-nine thousand, four hundred ninety-two".