140645388 has 96 divisors (see below), whose sum is σ = 369295360. Its totient is φ = 41368320.

The previous prime is 140645387. The next prime is 140645423. The reversal of 140645388 is 883546041.

It is a super-2 number, since 2×140645388² = 39562250331341088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (140645387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614058 + ... + 614286.

Almost surely, 2^140645388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140645388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184647680).

140645388 is an abundant number, since it is smaller than the sum of its proper divisors (228649972).

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

140645388 is a wasteful number, since it uses less digits than its factorization.

140645388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 140645388 is about 11859.4008280351. The cubic root of 140645388 is about 520.0460856591.

The spelling of 140645388 in words is "one hundred forty million, six hundred forty-five thousand, three hundred eighty-eight".