61878898 has 16 divisors (see below), whose sum is σ = 94476096. Its totient is φ = 30391920.

The previous prime is 61878889. The next prime is 61878899. The reversal of 61878898 is 89887816.

It is a super-3 number, since 3×61878898³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61878899) 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, 25840 + ... + 28132.

It is an arithmetic number, because the mean of its divisors is an integer number (5904756).

Almost surely, 2^61878898 is an apocalyptic number.

61878898 is a deficient number, since it is larger than the sum of its proper divisors (32597198).

61878898 is a wasteful number, since it uses less digits than its factorization.

61878898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529.

The product of its digits is 1548288, while the sum is 55.

The square root of 61878898 is about 7866.3141305188. The cubic root of 61878898 is about 395.5313002154.

The spelling of 61878898 in words is "sixty-one million, eight hundred seventy-eight thousand, eight hundred ninety-eight".