523498140 has 240 divisors, whose sum is σ = 1855133280. Its totient is φ = 122411520.

The previous prime is 523498117. The next prime is 523498141. The reversal of 523498140 is 41894325.

523498140 is a `hidden beast` number, since 5 + 23 + 498 + 140 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 523498095 and 523498104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523498141) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 516274 + ... + 517286.

It is an arithmetic number, because the mean of its divisors is an integer number (7729722).

Almost surely, 2^523498140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523498140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927566640).

523498140 is an abundant number, since it is smaller than the sum of its proper divisors (1331635140).

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

523498140 is a wasteful number, since it uses less digits than its factorization.

523498140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 523498140 is about 22880.0817306233. The cubic root of 523498140 is about 805.9443362684.

The spelling of 523498140 in words is "five hundred twenty-three million, four hundred ninety-eight thousand, one hundred forty".