10551780 has 108 divisors (see below), whose sum is σ = 33615036. Its totient is φ = 2678400.

The previous prime is 10551769. The next prime is 10551799. The reversal of 10551780 is 8715501.

It can be written as a sum of positive squares in 2 ways, for example, as 1695204 + 8856576 = 1302^2 + 2976^2 .

It is a super-2 number, since 2×10551780² = 222680122336800, which contains 22 as substring.

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, 172950 + ... + 173010.

Almost surely, 2^10551780 is an apocalyptic number.

10551780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10551780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16807518).

10551780 is an abundant number, since it is smaller than the sum of its proper divisors (23063256).

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

10551780 is a wasteful number, since it uses less digits than its factorization.

10551780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 10551780 is about 3248.3503505626. The cubic root of 10551780 is about 219.3353216767.

The spelling of 10551780 in words is "ten million, five hundred fifty-one thousand, seven hundred eighty".