55402406 has 4 divisors (see below), whose sum is σ = 83103612. Its totient is φ = 27701202.

The previous prime is 55402397. The next prime is 55402409. The reversal of 55402406 is 60420455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60420455 = 5 ⋅12084091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13850600 + ... + 13850603.

It is an arithmetic number, because the mean of its divisors is an integer number (20775903).

Almost surely, 2^55402406 is an apocalyptic number.

55402406 is a deficient number, since it is larger than the sum of its proper divisors (27701206).

55402406 is a wasteful number, since it uses less digits than its factorization.

55402406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27701205.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 55402406 is about 7443.2792504379. The cubic root of 55402406 is about 381.2204665468.

The spelling of 55402406 in words is "fifty-five million, four hundred two thousand, four hundred six".