61790240 has 48 divisors (see below), whose sum is σ = 154573272. Its totient is φ = 23261184.

The previous prime is 61790233. The next prime is 61790243. The reversal of 61790240 is 4209716.

It can be written as a sum of positive squares in 4 ways, for example, as 52475536 + 9314704 = 7244^2 + 3052^2 .

It is not an unprimeable number, because it can be changed into a prime (61790243) 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, 8639 + ... + 14078.

Almost surely, 2^61790240 is an apocalyptic number.

It is an amenable number.

61790240 is an abundant number, since it is smaller than the sum of its proper divisors (92783032).

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

61790240 is a wasteful number, since it uses less digits than its factorization.

61790240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22749 (or 22741 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61790240 is about 7860.6768156438. The cubic root of 61790240 is about 395.3423086200.

Adding to 61790240 its reverse (4209716), we get a palindrome (65999956).

The spelling of 61790240 in words is "sixty-one million, seven hundred ninety thousand, two hundred forty".