740190021 has 8 divisors (see below), whose sum is σ = 987708960. Its totient is φ = 493065552.

The previous prime is 740189971. The next prime is 740190079. The reversal of 740190021 is 120091047.

740190021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 740190021 - 2⁷ = 740189893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 740189973 and 740190000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740190091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94210 + ... + 101763.

It is an arithmetic number, because the mean of its divisors is an integer number (123463620).

Almost surely, 2^740190021 is an apocalyptic number.

It is an amenable number.

740190021 is a deficient number, since it is larger than the sum of its proper divisors (247518939).

740190021 is a wasteful number, since it uses less digits than its factorization.

740190021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197235.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 740190021 is about 27206.4334487268. The cubic root of 740190021 is about 904.5815841003.

The spelling of 740190021 in words is "seven hundred forty million, one hundred ninety thousand, twenty-one".