401745390 has 32 divisors (see below), whose sum is σ = 979999776. Its totient is φ = 105375360.

The previous prime is 401745373. The next prime is 401745391. The reversal of 401745390 is 93547104.

It is a super-2 number, since 2×401745390² = 322798716772504200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401745391) 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, 107937 + ... + 111596.

It is an arithmetic number, because the mean of its divisors is an integer number (30624993).

Almost surely, 2^401745390 is an apocalyptic number.

401745390 is an abundant number, since it is smaller than the sum of its proper divisors (578254386).

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

401745390 is a wasteful number, since it uses less digits than its factorization.

401745390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219604.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 401745390 is about 20043.5872537827. The cubic root of 401745390 is about 737.8764233710.

The spelling of 401745390 in words is "four hundred one million, seven hundred forty-five thousand, three hundred ninety".