64349040 has 80 divisors (see below), whose sum is σ = 227985408. Its totient is φ = 14707968.

The previous prime is 64349017. The next prime is 64349041. The reversal of 64349040 is 4094346.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 64348989 and 64349007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64349041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17472 + ... + 20831.

Almost surely, 2^64349040 is an apocalyptic number.

64349040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64349040 is an abundant number, since it is smaller than the sum of its proper divisors (163636368).

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

64349040 is a wasteful number, since it uses less digits than its factorization.

64349040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38326 (or 38320 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 64349040 is about 8021.7853374420. The cubic root of 64349040 is about 400.7258487290.

The spelling of 64349040 in words is "sixty-four million, three hundred forty-nine thousand, forty".