1979550 has 72 divisors (see below), whose sum is σ = 5484024. Its totient is φ = 511680.

The previous prime is 1979543. The next prime is 1979563. The reversal of 1979550 is 559791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23809 + ... + 23891.

It is an arithmetic number, because the mean of its divisors is an integer number (76167).

2^1979550 is an apocalyptic number.

1979550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2742012).

1979550 is an abundant number, since it is smaller than the sum of its proper divisors (3504474).

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

1979550 is a wasteful number, since it uses less digits than its factorization.

1979550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 1979550 is about 1406.9648183235. The cubic root of 1979550 is about 125.5612099100.

The spelling of 1979550 in words is "one million, nine hundred seventy-nine thousand, five hundred fifty".