52299390 has 128 divisors (see below), whose sum is σ = 150377472. Its totient is φ = 11473920.

The previous prime is 52299349. The next prime is 52299397. The reversal of 52299390 is 9399225.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52299397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 313087 + ... + 313253.

It is an arithmetic number, because the mean of its divisors is an integer number (1174824).

Almost surely, 2^52299390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52299390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75188736).

52299390 is an abundant number, since it is smaller than the sum of its proper divisors (98078082).

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

52299390 is a wasteful number, since it uses less digits than its factorization.

52299390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 52299390 is about 7231.8317181749. The cubic root of 52299390 is about 373.9660764030.

The spelling of 52299390 in words is "fifty-two million, two hundred ninety-nine thousand, three hundred ninety".