531078420 has 24 divisors (see below), whose sum is σ = 1487019744. Its totient is φ = 141620896.

The previous prime is 531078409. The next prime is 531078437. The reversal of 531078420 is 24870135.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4425594 + ... + 4425713.

It is an arithmetic number, because the mean of its divisors is an integer number (61959156).

Almost surely, 2^531078420 is an apocalyptic number.

It is an amenable number.

531078420 is an abundant number, since it is smaller than the sum of its proper divisors (955941324).

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

531078420 is a wasteful number, since it uses less digits than its factorization.

531078420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8851319 (or 8851317 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 531078420 is about 23045.1387498535. The cubic root of 531078420 is about 809.8157483671.

The spelling of 531078420 in words is "five hundred thirty-one million, seventy-eight thousand, four hundred twenty".