354421021440 has 72 divisors (see below), whose sum is σ = 1131932149488. Its totient is φ = 94512271360.

The previous prime is 354421021433. The next prime is 354421021441. The reversal of 354421021440 is 44120124453.

It is a super-2 number, since 2×354421021440² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 354421021398 and 354421021407.

It is not an unprimeable number, because it can be changed into a prime (354421021441) 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, 46144731 + ... + 46152410.

It is an arithmetic number, because the mean of its divisors is an integer number (15721279854).

Almost surely, 2^354421021440 is an apocalyptic number.

354421021440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

354421021440 is an abundant number, since it is smaller than the sum of its proper divisors (777511128048).

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

354421021440 is an equidigital number, since it uses as much as digits as its factorization.

354421021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92297165 (or 92297151 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 354421021440 its reverse (44120124453), we get a palindrome (398541145893).

The spelling of 354421021440 in words is "three hundred fifty-four billion, four hundred twenty-one million, twenty-one thousand, four hundred forty".