401977455 has 32 divisors (see below), whose sum is σ = 702535680. Its totient is φ = 194647680.

The previous prime is 401977451. The next prime is 401977469. The reversal of 401977455 is 554779104.

It is a happy number.

It is not a de Polignac number, because 401977455 - 2² = 401977451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401977451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236589 + ... + 238281.

It is an arithmetic number, because the mean of its divisors is an integer number (21954240).

Almost surely, 2^401977455 is an apocalyptic number.

401977455 is a deficient number, since it is larger than the sum of its proper divisors (300558225).

401977455 is a wasteful number, since it uses less digits than its factorization.

401977455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 401977455 is about 20049.3754266810. The cubic root of 401977455 is about 738.0184721546.

The spelling of 401977455 in words is "four hundred one million, nine hundred seventy-seven thousand, four hundred fifty-five".