1099145940 has 48 divisors (see below), whose sum is σ = 3085024320. Its totient is φ = 292399360.

The previous prime is 1099145923. The next prime is 1099145969. The reversal of 1099145940 is 495419901.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1099145892 and 1099145901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3280 + ... + 47000.

It is an arithmetic number, because the mean of its divisors is an integer number (64271340).

Almost surely, 2^1099145940 is an apocalyptic number.

1099145940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099145940 is an abundant number, since it is smaller than the sum of its proper divisors (1985878380).

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

1099145940 is a wasteful number, since it uses less digits than its factorization.

1099145940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44152 (or 44150 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1099145940 is about 33153.3699644546. The cubic root of 1099145940 is about 1032.0128859337.

The spelling of 1099145940 in words is "one billion, ninety-nine million, one hundred forty-five thousand, nine hundred forty".