398741890 has 16 divisors (see below), whose sum is σ = 733007232. Its totient is φ = 156103024.

The previous prime is 398741887. The next prime is 398741897. The reversal of 398741890 is 98147893.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (398741897) 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, 423724 + ... + 424663.

It is an arithmetic number, because the mean of its divisors is an integer number (45812952).

Almost surely, 2^398741890 is an apocalyptic number.

398741890 is a deficient number, since it is larger than the sum of its proper divisors (334265342).

398741890 is a wasteful number, since it uses less digits than its factorization.

398741890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848441.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 398741890 is about 19968.5224791420. The cubic root of 398741890 is about 736.0330022713.

The spelling of 398741890 in words is "three hundred ninety-eight million, seven hundred forty-one thousand, eight hundred ninety".