61898368 has 96 divisors (see below), whose sum is σ = 146512800. Its totient is φ = 25966080.

The previous prime is 61898363. The next prime is 61898387. The reversal of 61898368 is 86389816.

It is a super-2 number, since 2×61898368² = 7662815922126848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (61898363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445243 + ... + 445381.

It is an arithmetic number, because the mean of its divisors is an integer number (1526175).

Almost surely, 2^61898368 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 61898368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73256400).

61898368 is an abundant number, since it is smaller than the sum of its proper divisors (84614432).

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

61898368 is a wasteful number, since it uses less digits than its factorization.

61898368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 219 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 61898368 is about 7867.5515886456. The cubic root of 61898368 is about 395.5727800904.

The spelling of 61898368 in words is "sixty-one million, eight hundred ninety-eight thousand, three hundred sixty-eight".