1121538690 has 64 divisors (see below), whose sum is σ = 3018798720. Its totient is φ = 296274240.

The previous prime is 1121538683. The next prime is 1121538703. The reversal of 1121538690 is 968351211.

1121538690 is a `hidden beast` number, since 11 + 21 + 538 + 6 + 90 = 666.

It is a super-2 number, since 2×1121538690² = 2515698066333832200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9480 + ... + 48300.

It is an arithmetic number, because the mean of its divisors is an integer number (47168730).

Almost surely, 2^1121538690 is an apocalyptic number.

1121538690 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 1121538690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509399360).

1121538690 is an abundant number, since it is smaller than the sum of its proper divisors (1897260030).

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

1121538690 is a wasteful number, since it uses less digits than its factorization.

1121538690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38944 (or 38938 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1121538690 is about 33489.3817500413. The cubic root of 1121538690 is about 1038.9741764855.

The spelling of 1121538690 in words is "one billion, one hundred twenty-one million, five hundred thirty-eight thousand, six hundred ninety".