525505440 has 48 divisors (see below), whose sum is σ = 1655343648. Its totient is φ = 140134656.

The previous prime is 525505429. The next prime is 525505447. The reversal of 525505440 is 44505525.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a junction number, because it is equal to n+sod(n) for n = 525505398 and 525505407.

It is not an unprimeable number, because it can be changed into a prime (525505447) 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, 546922 + ... + 547881.

It is an arithmetic number, because the mean of its divisors is an integer number (34486326).

Almost surely, 2^525505440 is an apocalyptic number.

It is an amenable number.

525505440 is an abundant number, since it is smaller than the sum of its proper divisors (1129838208).

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

525505440 is a wasteful number, since it uses less digits than its factorization.

525505440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094821 (or 1094813 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 525505440 is about 22923.9054264320. The cubic root of 525505440 is about 806.9731261272.

The spelling of 525505440 in words is "five hundred twenty-five million, five hundred five thousand, four hundred forty".