73861398 has 96 divisors (see below), whose sum is σ = 186732000. Its totient is φ = 20901888.

The previous prime is 73861387. The next prime is 73861429. The reversal of 73861398 is 89316837.

It is a happy number.

It is a super-2 number, since 2×73861398² = 10911012229028808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164278 + ... + 164726.

It is an arithmetic number, because the mean of its divisors is an integer number (1945125).

Almost surely, 2^73861398 is an apocalyptic number.

73861398 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 73861398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93366000).

73861398 is an abundant number, since it is smaller than the sum of its proper divisors (112870602).

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

73861398 is a wasteful number, since it uses less digits than its factorization.

73861398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 523 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 73861398 is about 8594.2654136348. The cubic root of 73861398 is about 419.5713654232.

The spelling of 73861398 in words is "seventy-three million, eight hundred sixty-one thousand, three hundred ninety-eight".