354420820 has 24 divisors (see below), whose sum is σ = 801536904. Its totient is φ = 130862976.

The previous prime is 354420809. The next prime is 354420827. The reversal of 354420820 is 28024453.

It can be written as a sum of positive squares in 4 ways, for example, as 5702544 + 348718276 = 2388^2 + 18674^2 .

It is a super-2 number, since 2×354420820² = 251228235298944800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354420827) 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, 681319 + ... + 681838.

It is an arithmetic number, because the mean of its divisors is an integer number (33397371).

Almost surely, 2^354420820 is an apocalyptic number.

It is an amenable number.

354420820 is an abundant number, since it is smaller than the sum of its proper divisors (447116084).

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

354420820 is a wasteful number, since it uses less digits than its factorization.

354420820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363179 (or 1363177 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 354420820 is about 18826.0675660107. The cubic root of 354420820 is about 707.6845951670.

The spelling of 354420820 in words is "three hundred fifty-four million, four hundred twenty thousand, eight hundred twenty".