989877740426 has 64 divisors (see below), whose sum is σ = 1600749008640. Its totient is φ = 457411691520.

The previous prime is 989877740413. The next prime is 989877740441. The reversal of 989877740426 is 624047778989.

It is a super-3 number, since 3×989877740426³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a self number, because there is not a number n which added to its sum of digits gives 989877740426.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1307632040 + ... + 1307632796.

It is an arithmetic number, because the mean of its divisors is an integer number (25011703260).

Almost surely, 2^989877740426 is an apocalyptic number.

989877740426 is a deficient number, since it is larger than the sum of its proper divisors (610871268214).

989877740426 is a wasteful number, since it uses less digits than its factorization.

989877740426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319.

The product of its (nonzero) digits is 341397504, while the sum is 71.

The spelling of 989877740426 in words is "nine hundred eighty-nine billion, eight hundred seventy-seven million, seven hundred forty thousand, four hundred twenty-six".