140915840 has 64 divisors (see below), whose sum is σ = 362811960. Its totient is φ = 52027392.

The previous prime is 140915813. The next prime is 140915851. The reversal of 140915840 is 48519041.

It can be written as a sum of positive squares in 4 ways, for example, as 77299264 + 63616576 = 8792^2 + 7976^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 140915797 and 140915806.

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, 149 + ... + 16788.

Almost surely, 2^140915840 is an apocalyptic number.

140915840 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 140915840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181405980).

140915840 is an abundant number, since it is smaller than the sum of its proper divisors (221896120).

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

140915840 is a wasteful number, since it uses less digits than its factorization.

140915840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16969 (or 16957 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 140915840 is about 11870.7977827945. The cubic root of 140915840 is about 520.3792105725.

The spelling of 140915840 in words is "one hundred forty million, nine hundred fifteen thousand, eight hundred forty".