64720435 has 8 divisors (see below), whose sum is σ = 83638800. Its totient is φ = 47793504.

The previous prime is 64720423. The next prime is 64720471. The reversal of 64720435 is 53402746.

64720435 = T₃₇₀ + T₃₇₁ + ... + T₇₅₉.

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

It is a cyclic number.

It is not a de Polignac number, because 64720435 - 2¹³ = 64712243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64720397 and 64720406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497785 + ... + 497914.

It is an arithmetic number, because the mean of its divisors is an integer number (10454850).

Almost surely, 2^64720435 is an apocalyptic number.

64720435 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64720435 is a deficient number, since it is larger than the sum of its proper divisors (18918365).

64720435 is a wasteful number, since it uses less digits than its factorization.

64720435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995717.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 64720435 is about 8044.9011802508. The cubic root of 64720435 is about 401.4953094089.

The spelling of 64720435 in words is "sixty-four million, seven hundred twenty thousand, four hundred thirty-five".