464881821 has 8 divisors (see below), whose sum is σ = 634960704. Its totient is φ = 302362080.

The previous prime is 464881817. The next prime is 464881829. The reversal of 464881821 is 128188464.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 464881821 - 2² = 464881817 is a prime.

It is a super-2 number, since 2×464881821² = 432230214992552082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (464881829) 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, 1889641 + ... + 1889886.

It is an arithmetic number, because the mean of its divisors is an integer number (79370088).

Almost surely, 2^464881821 is an apocalyptic number.

464881821 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

464881821 is a deficient number, since it is larger than the sum of its proper divisors (170078883).

464881821 is a wasteful number, since it uses less digits than its factorization.

464881821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779571.

The product of its digits is 98304, while the sum is 42.

The square root of 464881821 is about 21561.1182687726. The cubic root of 464881821 is about 774.6654517197.

The spelling of 464881821 in words is "four hundred sixty-four million, eight hundred eighty-one thousand, eight hundred twenty-one".