10531780 has 24 divisors (see below), whose sum is σ = 25276608. Its totient is φ = 3610848.

The previous prime is 10531771. The next prime is 10531811. The reversal of 10531780 is 8713501.

It is a super-2 number, since 2×10531780² = 221836779936800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37474 + ... + 37753.

It is an arithmetic number, because the mean of its divisors is an integer number (1053192).

Almost surely, 2^10531780 is an apocalyptic number.

10531780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10531780 is an abundant number, since it is smaller than the sum of its proper divisors (14744828).

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

10531780 is a wasteful number, since it uses less digits than its factorization.

10531780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75243 (or 75241 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 10531780 is about 3245.2704047583. The cubic root of 10531780 is about 219.1966568922.

Subtracting from 10531780 its sum of digits (25), we obtain a triangular number (10531755 = T₄₅₈₉).

It can be divided in two parts, 10531 and 780, that added together give a palindrome (11311).

The spelling of 10531780 in words is "ten million, five hundred thirty-one thousand, seven hundred eighty".