10899720 has 192 divisors, whose sum is σ = 40687920. Its totient is φ = 2506752.

The previous prime is 10899701. The next prime is 10899731. The reversal of 10899720 is 2799801.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4639716 + 6260004 = 2154^2 + 2502^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79492 + ... + 79628.

Almost surely, 2^10899720 is an apocalyptic number.

10899720 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 10899720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20343960).

10899720 is an abundant number, since it is smaller than the sum of its proper divisors (29788200).

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

10899720 is a wasteful number, since it uses less digits than its factorization.

10899720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 10899720 is about 3301.4723987942. The cubic root of 10899720 is about 221.7201245432.

The spelling of 10899720 in words is "ten million, eight hundred ninety-nine thousand, seven hundred twenty".