140209440 has 96 divisors (see below), whose sum is σ = 504766080. Its totient is φ = 32047104.

The previous prime is 140209423. The next prime is 140209477. The reversal of 140209440 is 44902041.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×140209440² = 39317374130227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 140209440.

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, 17505 + ... + 24224.

It is an arithmetic number, because the mean of its divisors is an integer number (5257980).

Almost surely, 2^140209440 is an apocalyptic number.

140209440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140209440 is an abundant number, since it is smaller than the sum of its proper divisors (364556640).

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

140209440 is a wasteful number, since it uses less digits than its factorization.

140209440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41754 (or 41746 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 140209440 is about 11841.0067139581. The cubic root of 140209440 is about 519.5082135439.

The spelling of 140209440 in words is "one hundred forty million, two hundred nine thousand, four hundred forty".