52099380 has 72 divisors (see below), whose sum is σ = 158822664. Its totient is φ = 13824000.

The previous prime is 52099363. The next prime is 52099381. The reversal of 52099380 is 8399025.

It can be written as a sum of positive squares in 4 ways, for example, as 345744 + 51753636 = 588^2 + 7194^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52099381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42780 + ... + 43980.

Almost surely, 2^52099380 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 52099380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79411332).

52099380 is an abundant number, since it is smaller than the sum of its proper divisors (106723284).

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

52099380 is a wasteful number, since it uses less digits than its factorization.

52099380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1452 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 52099380 is about 7217.9900249308. The cubic root of 52099380 is about 373.4887444660.

The spelling of 52099380 in words is "fifty-two million, ninety-nine thousand, three hundred eighty".