42528390 has 32 divisors (see below), whose sum is σ = 108073440. Its totient is φ = 10673664.

The previous prime is 42528359. The next prime is 42528433. The reversal of 42528390 is 9382524.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41185 + ... + 42204.

It is an arithmetic number, because the mean of its divisors is an integer number (3377295).

Almost surely, 2^42528390 is an apocalyptic number.

42528390 is an abundant number, since it is smaller than the sum of its proper divisors (65545050).

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

42528390 is a wasteful number, since it uses less digits than its factorization.

42528390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83416.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 42528390 is about 6521.3794552993. The cubic root of 42528390 is about 349.0542905062.

It can be divided in two parts, 42528 and 390, that multiplied together give a triangular number (16585920 = T₅₇₅₉).

The spelling of 42528390 in words is "forty-two million, five hundred twenty-eight thousand, three hundred ninety".