354400240 has 40 divisors (see below), whose sum is σ = 837499968. Its totient is φ = 139434240.

The previous prime is 354400199. The next prime is 354400243. The reversal of 354400240 is 42004453.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×354400240² = 251199060224115200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354400243) 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, 31432 + ... + 41191.

Almost surely, 2^354400240 is an apocalyptic number.

It is an amenable number.

354400240 is an abundant number, since it is smaller than the sum of its proper divisors (483099728).

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

354400240 is a wasteful number, since it uses less digits than its factorization.

354400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72697 (or 72691 counting only the distinct ones).

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

The square root of 354400240 is about 18825.5209755268. The cubic root of 354400240 is about 707.6708972971.

Adding to 354400240 its reverse (42004453), we get a palindrome (396404693).

The spelling of 354400240 in words is "three hundred fifty-four million, four hundred thousand, two hundred forty".