140387520 has 224 divisors, whose sum is σ = 548932608. Its totient is φ = 29601792.

The previous prime is 140387497. The next prime is 140387551. The reversal of 140387520 is 25783041.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86557 + ... + 88163.

It is an arithmetic number, because the mean of its divisors is an integer number (2450592).

Almost surely, 2^140387520 is an apocalyptic number.

140387520 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 140387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274466304).

140387520 is an abundant number, since it is smaller than the sum of its proper divisors (408545088).

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

140387520 is a wasteful number, since it uses less digits than its factorization.

140387520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 140387520 is about 11848.5239587047. The cubic root of 140387520 is about 519.7280629419.

The spelling of 140387520 in words is "one hundred forty million, three hundred eighty-seven thousand, five hundred twenty".