140401440 has 72 divisors (see below), whose sum is σ = 479124828. Its totient is φ = 37440000.

The previous prime is 140401439. The next prime is 140401451. The reversal of 140401440 is 44104041.

It can be written as a sum of positive squares in 2 ways, for example, as 140280336 + 121104 = 11844^2 + 348^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47311 + ... + 50190.

Almost surely, 2^140401440 is an apocalyptic number.

140401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140401440 is an abundant number, since it is smaller than the sum of its proper divisors (338723388).

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

140401440 is a wasteful number, since it uses less digits than its factorization.

140401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97522 (or 97511 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 140401440 is about 11849.1113590851. Note that the first 3 decimals coincide. The cubic root of 140401440 is about 519.7452400992.

Adding to 140401440 its reverse (44104041), we get a palindrome (184505481).

The spelling of 140401440 in words is "one hundred forty million, four hundred one thousand, four hundred forty".