855021492 has 36 divisors (see below), whose sum is σ = 2327559780. Its totient is φ = 263083392.

The previous prime is 855021491. The next prime is 855021539. The reversal of 855021492 is 294120558.

855021492 is a `hidden beast` number, since 8 + 5 + 502 + 149 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 388720656 + 466300836 = 19716^2 + 21594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855021491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913017 + ... + 913952.

Almost surely, 2^855021492 is an apocalyptic number.

It is an amenable number.

855021492 is an abundant number, since it is smaller than the sum of its proper divisors (1472538288).

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

855021492 is a wasteful number, since it uses less digits than its factorization.

855021492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826992 (or 1826987 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 855021492 is about 29240.7505375632. The cubic root of 855021492 is about 949.1299483795.

The spelling of 855021492 in words is "eight hundred fifty-five million, twenty-one thousand, four hundred ninety-two".