61812398 has 16 divisors (see below), whose sum is σ = 97493760. Its totient is φ = 29349600.

The previous prime is 61812397. The next prime is 61812407. The reversal of 61812398 is 89321816.

It is a super-3 number, since 3×61812398³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61812397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5198 + ... + 12273.

It is an arithmetic number, because the mean of its divisors is an integer number (6093360).

Almost surely, 2^61812398 is an apocalyptic number.

61812398 is a deficient number, since it is larger than the sum of its proper divisors (35681362).

61812398 is a wasteful number, since it uses less digits than its factorization.

61812398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17563.

The product of its digits is 20736, while the sum is 38.

The square root of 61812398 is about 7862.0861099329. The cubic root of 61812398 is about 395.3895595988.

The spelling of 61812398 in words is "sixty-one million, eight hundred twelve thousand, three hundred ninety-eight".