340904820 has 48 divisors (see below), whose sum is σ = 958567680. Its totient is φ = 90523776.

The previous prime is 340904813. The next prime is 340904833. The reversal of 340904820 is 28409043.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2454 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (19970160).

Almost surely, 2^340904820 is an apocalyptic number.

340904820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340904820 is an abundant number, since it is smaller than the sum of its proper divisors (617662860).

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

340904820 is a wasteful number, since it uses less digits than its factorization.

340904820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024 (or 24022 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 340904820 is about 18463.6079897727. The cubic root of 340904820 is about 698.5717955104.

The spelling of 340904820 in words is "three hundred forty million, nine hundred four thousand, eight hundred twenty".