140397408 has 96 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 45698688.

The previous prime is 140397391. The next prime is 140397427. The reversal of 140397408 is 804793041.

It is a happy number.

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

It is a super-2 number, since 2×140397408² = 39422864346236928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 35263 + ... + 39041.

It is an arithmetic number, because the mean of its divisors is an integer number (4365900).

Almost surely, 2^140397408 is an apocalyptic number.

140397408 is a gapful number since it is divisible by the number (18) 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 140397408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209563200).

140397408 is an abundant number, since it is smaller than the sum of its proper divisors (278728992).

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

140397408 is a wasteful number, since it uses less digits than its factorization.

140397408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3827 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 140397408 is about 11848.9412185224. The cubic root of 140397408 is about 519.7402647635.

The spelling of 140397408 in words is "one hundred forty million, three hundred ninety-seven thousand, four hundred eight".