52378740 has 36 divisors (see below), whose sum is σ = 158882724. Its totient is φ = 13967616.

The previous prime is 52378723. The next prime is 52378769. The reversal of 52378740 is 4787325.

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 32558436 = 4452^2 + 5706^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 52378695 and 52378704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145317 + ... + 145676.

It is an arithmetic number, because the mean of its divisors is an integer number (4413409).

Almost surely, 2^52378740 is an apocalyptic number.

It is an amenable number.

52378740 is an abundant number, since it is smaller than the sum of its proper divisors (106503984).

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

52378740 is a wasteful number, since it uses less digits than its factorization.

52378740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291008 (or 291003 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 52378740 is about 7237.3158007648. The cubic root of 52378740 is about 374.1551111974.

The spelling of 52378740 in words is "fifty-two million, three hundred seventy-eight thousand, seven hundred forty".