421625390 has 16 divisors (see below), whose sum is σ = 798869520. Its totient is φ = 159773760.

The previous prime is 421625377. The next prime is 421625419. The reversal of 421625390 is 93526124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109351 + ... + 1109730.

It is an arithmetic number, because the mean of its divisors is an integer number (49929345).

Almost surely, 2^421625390 is an apocalyptic number.

421625390 is a deficient number, since it is larger than the sum of its proper divisors (377244130).

421625390 is a wasteful number, since it uses less digits than its factorization.

421625390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219107.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 421625390 is about 20533.5186950508. The cubic root of 421625390 is about 749.8520537808.

The spelling of 421625390 in words is "four hundred twenty-one million, six hundred twenty-five thousand, three hundred ninety".