857988741 has 8 divisors (see below), whose sum is σ = 1147442464. Its totient is φ = 570263760.

The previous prime is 857988737. The next prime is 857988749. The reversal of 857988741 is 147889758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 857988741 - 2² = 857988737 is a prime.

It is a super-2 number, since 2×857988741² = 1472289359365530162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857988749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431026 + ... + 433011.

It is an arithmetic number, because the mean of its divisors is an integer number (143430308).

Almost surely, 2^857988741 is an apocalyptic number.

It is an amenable number.

857988741 is a deficient number, since it is larger than the sum of its proper divisors (289453723).

857988741 is a wasteful number, since it uses less digits than its factorization.

857988741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864371.

The product of its digits is 4515840, while the sum is 57.

The square root of 857988741 is about 29291.4448431620. Note that the first 3 decimals coincide. The cubic root of 857988741 is about 950.2266277422.

The spelling of 857988741 in words is "eight hundred fifty-seven million, nine hundred eighty-eight thousand, seven hundred forty-one".