72002407 has 4 divisors (see below), whose sum is σ = 73948456. Its totient is φ = 70056360.

The previous prime is 72002401. The next prime is 72002431. The reversal of 72002407 is 70420027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72002407 - 2⁷ = 72002279 is a prime.

It is a super-2 number, since 2×72002407² = 10368693227587298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72002401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972969 + ... + 973042.

It is an arithmetic number, because the mean of its divisors is an integer number (18487114).

Almost surely, 2^72002407 is an apocalyptic number.

72002407 is a deficient number, since it is larger than the sum of its proper divisors (1946049).

72002407 is a wasteful number, since it uses less digits than its factorization.

72002407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946048.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 72002407 is about 8485.4232068884. The cubic root of 72002407 is about 416.0214004492.

The spelling of 72002407 in words is "seventy-two million, two thousand, four hundred seven".