642436046 has 16 divisors (see below), whose sum is σ = 1149202944. Its totient is φ = 263358744.

The previous prime is 642436021. The next prime is 642436049. The reversal of 642436046 is 640634246.

It is a super-2 number, since 2×642436046² = 825448146400228232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642435997 and 642436015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642436049) 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, 997250 + ... + 997893.

It is an arithmetic number, because the mean of its divisors is an integer number (71825184).

Almost surely, 2^642436046 is an apocalyptic number.

642436046 is a deficient number, since it is larger than the sum of its proper divisors (506766898).

642436046 is a wasteful number, since it uses less digits than its factorization.

642436046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995175.

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 642436046 is about 25346.3221395137. The cubic root of 642436046 is about 862.8658879181.

The spelling of 642436046 in words is "six hundred forty-two million, four hundred thirty-six thousand, forty-six".