61898670 has 48 divisors (see below), whose sum is σ = 163678320. Its totient is φ = 16225152.

The previous prime is 61898651. The next prime is 61898689. The reversal of 61898670 is 7689816.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61898651) and next prime (61898689).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 519 + ... + 11138.

It is an arithmetic number, because the mean of its divisors is an integer number (3409965).

Almost surely, 2^61898670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61898670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81839160).

61898670 is an abundant number, since it is smaller than the sum of its proper divisors (101779650).

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

61898670 is a wasteful number, since it uses less digits than its factorization.

61898670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11729 (or 11726 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61898670 is about 7867.5707813785. The cubic root of 61898670 is about 395.5734234180.

The spelling of 61898670 in words is "sixty-one million, eight hundred ninety-eight thousand, six hundred seventy".