981738550 has 48 divisors (see below), whose sum is σ = 2070023760. Its totient is φ = 343405440.

The previous prime is 981738523. The next prime is 981738553. The reversal of 981738550 is 55837189.

It is a super-2 number, since 2×981738550² = 1927621161112205000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 981738550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981738553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27397 + ... + 52096.

It is an arithmetic number, because the mean of its divisors is an integer number (43125495).

Almost surely, 2^981738550 is an apocalyptic number.

981738550 is an abundant number, since it is smaller than the sum of its proper divisors (1088285210).

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

981738550 is a wasteful number, since it uses less digits than its factorization.

981738550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79537 (or 79532 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 981738550 is about 31332.7073519031. The cubic root of 981738550 is about 993.8754160502.

The spelling of 981738550 in words is "nine hundred eighty-one million, seven hundred thirty-eight thousand, five hundred fifty".