109897840 has 80 divisors (see below), whose sum is σ = 276919776. Its totient is φ = 40320000.

The previous prime is 109897819. The next prime is 109897861. The reversal of 109897840 is 48798901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109897819) and next prime (109897861).

It is a tau number, because it is divible by the number of its divisors (80).

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, 260830 + ... + 261250.

Almost surely, 2^109897840 is an apocalyptic number.

109897840 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 109897840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138459888).

109897840 is an abundant number, since it is smaller than the sum of its proper divisors (167021936).

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

109897840 is a wasteful number, since it uses less digits than its factorization.

109897840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 109897840 is about 10483.2170634782. The cubic root of 109897840 is about 478.9936090198.

The spelling of 109897840 in words is "one hundred nine million, eight hundred ninety-seven thousand, eight hundred forty".