396407649 has 32 divisors (see below), whose sum is σ = 612005760. Its totient is φ = 225561600.

The previous prime is 396407623. The next prime is 396407651. The reversal of 396407649 is 946704693.

It is not a de Polignac number, because 396407649 - 2²⁰ = 395359073 is a prime.

It is a super-3 number, since 3×396407649³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 396407598 and 396407607.

It is not an unprimeable number, because it can be changed into a prime (396407449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370287 + ... + 371355.

It is an arithmetic number, because the mean of its divisors is an integer number (19125180).

Almost surely, 2^396407649 is an apocalyptic number.

It is an amenable number.

396407649 is a deficient number, since it is larger than the sum of its proper divisors (215598111).

396407649 is a wasteful number, since it uses less digits than its factorization.

396407649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 396407649 is about 19909.9886740299. The cubic root of 396407649 is about 734.5939411036.

The spelling of 396407649 in words is "three hundred ninety-six million, four hundred seven thousand, six hundred forty-nine".