140405670 has 32 divisors (see below), whose sum is σ = 374415840. Its totient is φ = 37441440.

The previous prime is 140405659. The next prime is 140405677. The reversal of 140405670 is 76504041.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140405677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259741 + ... + 260280.

It is an arithmetic number, because the mean of its divisors is an integer number (11700495).

Almost surely, 2^140405670 is an apocalyptic number.

140405670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140405670 is an abundant number, since it is smaller than the sum of its proper divisors (234010170).

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

140405670 is a wasteful number, since it uses less digits than its factorization.

140405670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520037 (or 520031 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 140405670 is about 11849.2898521388. The cubic root of 140405670 is about 519.7504596570.

The spelling of 140405670 in words is "one hundred forty million, four hundred five thousand, six hundred seventy".