61398490 has 8 divisors (see below), whose sum is σ = 110517300. Its totient is φ = 24559392.

The previous prime is 61398479. The next prime is 61398499. The reversal of 61398490 is 9489316.

It can be written as a sum of positive squares in 2 ways, for example, as 57289761 + 4108729 = 7569^2 + 2027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61398499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3069915 + ... + 3069934.

Almost surely, 2^61398490 is an apocalyptic number.

61398490 is a deficient number, since it is larger than the sum of its proper divisors (49118810).

61398490 is a wasteful number, since it uses less digits than its factorization.

61398490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139856.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 61398490 is about 7835.7188566206. The cubic root of 61398490 is about 394.5050468870.

The spelling of 61398490 in words is "sixty-one million, three hundred ninety-eight thousand, four hundred ninety".