420400354 has 16 divisors (see below), whose sum is σ = 689065056. Its totient is φ = 190775200.

The previous prime is 420400339. The next prime is 420400369. The reversal of 420400354 is 453004024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420400339) and next prime (420400369).

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 1912 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (43066566).

Almost surely, 2^420400354 is an apocalyptic number.

420400354 is a deficient number, since it is larger than the sum of its proper divisors (268664702).

420400354 is a wasteful number, since it uses less digits than its factorization.

420400354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31601.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 420400354 is about 20503.6668427869. Note that the first 3 decimals coincide. The cubic root of 420400354 is about 749.1251155368.

Adding to 420400354 its reverse (453004024), we get a palindrome (873404378).

The spelling of 420400354 in words is "four hundred twenty million, four hundred thousand, three hundred fifty-four".