398401545 has 16 divisors (see below), whose sum is σ = 674939520. Its totient is φ = 199981824.

The previous prime is 398401543. The next prime is 398401559. The reversal of 398401545 is 545104893.

It is not a de Polignac number, because 398401545 - 2¹ = 398401543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398401543) 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, 780925 + ... + 781434.

It is an arithmetic number, because the mean of its divisors is an integer number (42183720).

Almost surely, 2^398401545 is an apocalyptic number.

It is an amenable number.

398401545 is a deficient number, since it is larger than the sum of its proper divisors (276537975).

398401545 is a wasteful number, since it uses less digits than its factorization.

398401545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562384.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 398401545 is about 19959.9986222444. The cubic root of 398401545 is about 735.8235297070.

The spelling of 398401545 in words is "three hundred ninety-eight million, four hundred one thousand, five hundred forty-five".